Generated usdz has a random y rotation when the auto-rotate attribute is used

[vincentfretin]

Description

When not using ios-src, the generated usdz is correctly facing us when you don't have the auto-rotate attribute on the model-viewer tag.
When you have the auto-rotate attribute set, the generated usdz y rotation is different each time you click on the AR button.
I have currently no idea how this is correlated and where in the code the issue may be.
I found the issue while testing the placement "wall" for QuickLook, see my original comment #4030 (comment)

Live Demo

https://vfretin-wrong-usdz-y-rotation.glitch.me/
I removed the ios-src attribute and kept the auto-rotate attribute.

https://vfretin-ok-usdz-y-rotation.glitch.me/
I removed the ios-src and the auto-rotate attributes. This one is working correctly.

Version

• model-viewer: v3.4.0

Browser Affected

• Chrome, version: xx.x.xxxx.xx
• Edge
• Firefox
• IE
• Safari

OS

• Android
• iOS
• Linux
• MacOS
• Windows

AR

• WebXR
• SceneViewer
• QuickLook

[elalish]

Thank you for the very clear repro!

[vincentfretin]

I'm glad you found the issue and did the fix!